Thok Mak was a 23rd century male Klingon individual. Thok Mak was the younger brother of Worf, father of Mogh, and uncle to Worf's son, Mogh. In 2291, he rose to the rank of Instructor that was attached to the Elite Command Academy where he helped General Chang in the training of Cadets. During the Klingon Civil War caused by the House of G'Iogh, Thok Mak became a theater control officer for Chang where they worked to defeat the usurper Melkor. (ST video game: Klingon Academy) Thok Mak was played by Michael Dorn.